<template>
    <div :class="className" :style="{ height: height, width: width }" />
</template>

<script>
import echarts from 'echarts';

require('echarts/theme/macarons'); // echarts theme
import { debounce } from '@/utils';

export default {
    props: {
        className: {
            type: String,
            default: 'chart',
        },
        width: {
            type: String,
            default: '100%',
        },
        height: {
            type: String,
            default: '300px',
        },
    },
    data() {
        return {
            chart: null,
        };
    },
    mounted() {
        this.initChart();
        this.__resizeHandler = debounce(() => {
            if (this.chart) {
                this.chart.resize();
            }
        }, 100);
        window.addEventListener('resize', this.__resizeHandler);
    },
    beforeDestroy() {
        if (!this.chart) {
            return;
        }
        window.removeEventListener('resize', this.__resizeHandler);
        this.chart.dispose();
        this.chart = null;
    },
    methods: {
        initChart() {
            this.chart = echarts.init(this.$el, 'macarons');

            this.chart.setOption({
                tooltip: {
                    formatter: '{a} <br/>{b} : {c}%',
                },
                toolbox: {
                    feature: {
                        restore: {},
                        saveAsImage: {},
                    },
                },
                series: [
                    {
                        name: '业务指标',
                        type: 'gauge',
                        detail: { formatter: '{value}%' },
                        data: [{ value: 50, name: '完成率' }],
                    },
                ],
            });
        },
    },
};
</script>
